Speaking of pushing the envelope, Aguilera also talked about her new album, Lotus, the cover of which she notably posed nude for.

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"She's such like, you know, a force in a room," gushed Aguilera of Clinton. "She's got that star charisma and everything about her. I couldn't take me eyes off her either--so, it was mutual."

Updated at 11:02 AM PDT on Friday, Dec 7, 2012

Ellen DeGeneres couldn't help but ask Christina Aguilera about that photo of her and Hillary Clinton.

"That looks like it was Photoshopped, but it's not. That was a real moment," the "Voice" judge said in an interview airing tomorrow on "Ellen," referring to the shot of the Secretary of State seemingly appraising Aguilera's decolletage at a leadership-awards ceremony in October.

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"Could you feel her gazing down on your...breastesses?" quipped Ellen.

"It's our third season in and us as coaches have hit our stride," Aguilera, who has no team members left in the competition this season, explained why she seemed more relaxed these days. "We get what it's all about. We're invested in our teams and I'm sitting next to [Blake Shelton] the whole time, so how can I not laugh?

"Between him and [Cee Lo Green], with his gas over there. Then there's [Adam Levine] over there, very competitive."